<template>
  <el-card>
    <el-form inline>
      <el-form-item>
        <el-input v-model="paramsState.username" placeholder="用户名" />
      </el-form-item>
      <el-button type="primary" :icon="Search" @click="search">查询</el-button>
      <el-button type="default" @click="resetSearch">清空</el-button>
    </el-form>
    <div style="margin: 20px 0">
      <el-button type="primary" @click="showAddUser">添 加</el-button>
      <el-button type="danger" @click="revomveUsers" :disabled="tableState.selectedIds.length===0">批量删除</el-button>
    </div>
    <el-table border stripe v-loading="listLoading" :data="tableState.users" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" />
      <el-table-column type="index" label="序号" width="80" align="center" />
      <el-table-column prop="username" label="用户名" width="150" />
      <el-table-column prop="nickName" label="用户昵称" />
      <el-table-column prop="roleName" label="角色列表" width="200" />
      <el-table-column prop="gmtCreate" label="创建时间" width="180" />
      <el-table-column prop="gmtModified" label="更新时间" width="180" />
      <el-table-column label="操作" width="200" align="center" fixed="right">
        <template v-slot="{row}">
          <el-button type="info" size="small" :icon="UserFilled" title="分配角色" @click="showAssignRole(row)" />
          <el-button type="primary" size="small" :icon="Edit" title="修改用户" @click="showUpdateUser(row)" />
          <el-popconfirm :title="`确定删除 ${row.username} 吗?`" @confirm="removeUser(row.id)">
            <template #reference>
              <el-button style="margin-left:10px" type="danger" size="small" :icon="Delete" title="删除用户" />
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <el-pagination :current-page="paramsState.page" :page-size="paramsState.limit" :total="tableState.total" :page-sizes="[5, 10, 20, 30]" style="padding: 20px 0;" layout="prev, pager, next, jumper, ->, sizes, total" @current-change="getUsers" @size-change="getUsers(1, $event)" />
    <el-dialog :title="userState.user?.id ? '修改用户' : '添加用户'" v-model="userState.dialogUserVisible">
      <el-form ref="userFormRef" :model="userState.user" :rules="userRules" label-width="120px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="userState.user.username" />
        </el-form-item>
        <el-form-item label="用户昵称">
          <el-input v-model="userState.user.nickName" />
        </el-form-item>
        <el-form-item v-if="!userState.user.id" label="用户密码" prop="password">
          <el-input v-model="userState.user.password" />
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button @click="cancel">取 消</el-button>
          <el-button :loading="userState.userLoading" type="primary" @click="addOrUpdate">确 定</el-button>
        </div>
      </template>
    </el-dialog>

    <el-dialog title="设置角色" v-model="roleState.dialogRoleVisible" :before-close="resetRoleData">
      <el-form label-width="80px">
        <el-form-item label="用户名">
          <el-input disabled :value="userState.user.username"></el-input>
        </el-form-item>
        <el-form-item label="角色列表">
          <el-checkbox :indeterminate="roleState.isIndeterminate" v-model="roleState.checkAll" @change="handleCheckAllChange">全选</el-checkbox>
          <div style="margin: 15px 0;"></div>
          <el-checkbox-group v-model="roleState.userRoleIds" @change="handleCheckedChange">
            <el-checkbox v-for="role in roleState.allRoles" :key="role.id" :label="role.id">{{role.roleName}}</el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button :loading="roleState.roleLoading" type="primary" @click="assignRole">保存</el-button>
        <el-button @click="resetRoleData">取消</el-button>
      </template>
    </el-dialog>
  </el-card>
</template>

<script lang="ts">
export default {
  name: 'User'
}
</script>

<script lang="ts" setup>
import {
  ElCard,
  ElForm,
  ElFormItem,
  ElInput,
  ElButton,
  ElTable,
  ElTableColumn,
  ElPopconfirm,
  ElPagination,
  ElDialog,
  ElCheckbox,
  ElCheckboxGroup,
  ElMessage,
  ElMessageBox
} from 'element-plus'
// 引入组件的对象的类型
import type { FormInstance } from 'element-plus'
// 引入图标
import { Search, Edit, UserFilled, Delete } from '@element-plus/icons-vue'
import { reactive, ref, onMounted, nextTick } from 'vue'
// 引入用户信息的列表数据类型和用户信息对象的类型
import type { UserListModel, UserModel } from '@/api/acl/model/userModel'
// 引入角色列表的数据类型
import type { RoleListModel } from '@/api/acl/model/roleModel'
import {
  assignUserRoleListApi,
  getUserRoleListApi,
  removeUsersApi,
  removeUserApi,
  getUserListApi,
  saveOrUpdateUserApi
} from '@/api/acl/user'

const listLoading = ref(false) // 是否显示列表加载的提示
const paramsState = reactive({
  username: '',
  searchUsername: '',
  page: 1, // 当前页码
  limit: 5 // 每页数量
})

interface TableState {
  total: number
  users: UserListModel
  selectedIds: string[]
}
const tableState = reactive<TableState>({
  total: 0,
  users: [],
  selectedIds: []
})

/* 
  自定义密码校验
  */
const validatePassword = (rule: any, value: any, callback: any) => {
  if (!value) {
    callback('密码必须输入')
  } else if (!value || value.length < 6) {
    callback('密码不能小于6位')
  } else {
    callback()
  }
}

// 用户添加/修改表单的校验规则
const userRules = {
  username: [
    { required: true, message: '用户名必须输入' },
    { min: 4, message: '用户名不能小于4位' }
  ],
  password: [{ required: true, validator: validatePassword }]
}

interface UserState {
  dialogUserVisible: boolean
  userLoading: boolean
  user: UserModel
}

const userState = reactive<UserState>({
  dialogUserVisible: false,
  userLoading: false,
  user: {
    username: '',
    nickName: '',
    password: ''
  }
})

interface RoleState {
  dialogRoleVisible: boolean
  roleLoading: boolean
  checkAll: boolean
  isIndeterminate: boolean
  userRoleIds: string[]
  allRoles: RoleListModel
}
const roleState = reactive<RoleState>({
  dialogRoleVisible: false,
  roleLoading: false,
  checkAll: false,
  isIndeterminate: false,
  userRoleIds: [],
  allRoles: []
})

const userFormRef = ref<FormInstance>()

onMounted(() => getUsers())

/* 
  显示指定角色的界面
  */
const showAssignRole = (user: UserModel) => {
  userState.user = user
  roleState.dialogRoleVisible = true
  getRoles()
}

/* 
  全选勾选状态发生改变的监听
  */
const handleCheckAllChange = (value: string | number | boolean) => {
  // value 当前勾选状态true/false
  // 如果当前全选, userRoleIds就是所有角色id的数组, 否则是空数组
  roleState.userRoleIds = value
    ? roleState.allRoles.map((item) => item.id as string)
    : []
  // 如果当前不是全选也不全不选时, 指定为false
  roleState.isIndeterminate = false
}

/* 
  异步获取用户的角色列表
  */
const getRoles = async () => {
  const result = await getUserRoleListApi(userState.user?.id as string)
  const { allRolesList, assignRoles } = result
  roleState.allRoles = allRolesList
  roleState.userRoleIds = assignRoles.map((item) => item.id as string)

  roleState.checkAll = allRolesList.length === assignRoles.length
  roleState.isIndeterminate =
    assignRoles.length > 0 && assignRoles.length < allRolesList.length
}

/* 
  角色列表选中项发生改变的监听
  */
const handleCheckedChange = () => {
  const { userRoleIds, allRoles } = roleState
  roleState.checkAll =
    userRoleIds.length === allRoles.length && allRoles.length > 0
  roleState.isIndeterminate =
    userRoleIds.length > 0 && userRoleIds.length < allRoles.length
}

/* 
  请求给用户进行角色授权
  */
const assignRole = async () => {
  const userId = userState.user?.id
  const roleIds = roleState.userRoleIds.join(',')
  roleState.roleLoading = true
  await assignUserRoleListApi(userId as string, roleIds)
  roleState.roleLoading = false
  ElMessage.success('分配角色成功')
  resetRoleData()

  // console.log(this.$store.getters.name, this.user)
  // if (this.$store.getters.name===this.user.username) {
  //   window.location.reload()
  // }
}

/* 
  重置用户角色的数据
  */
const resetRoleData = () => {
  Object.assign(roleState, {
    dialogRoleVisible: false,
    allRoles: [],
    userRoleIds: [],
    isIndeterminate: false,
    checkAll: false
  })
}

/* 
  根据输入进行搜索
  */
const search = () => {
  paramsState.searchUsername = paramsState.username
  getUsers(1)
}

/* 
  重置输入后搜索
  */
const resetSearch = () => {
  paramsState.searchUsername = ''
  paramsState.username = ''
  getUsers(1)
}

/* 
  显示添加用户的界面
  */
const showAddUser = () => {
  userState.user = {
    username: '',
    nickName: '',
    password: ''
  }
  userState.dialogUserVisible = true

  nextTick(() => userFormRef.value?.clearValidate())
}

/* 
  删除所有选中的用户
  */
const revomveUsers = () => {
  ElMessageBox.confirm('确定删除吗?')
    .then(async () => {
      await removeUsersApi(tableState.selectedIds)
      ElMessage.success('删除成功')
      getUsers()
    })
    .catch(() => {
      ElMessage.info('取消删除')
    })
}

/* 
  列表选中状态发生改变的监听回调
  */
const handleSelectionChange = (selection: any[]) => {
  tableState.selectedIds = selection.map((item) => item.id)
}

/* 
  显示更新用户的界面
  */
const showUpdateUser = (user: UserModel) => {
  userState.user = { ...user }
  userState.dialogUserVisible = true
}

/* 
  删除某个用户
  */
const removeUser = async (id: string) => {
  await removeUserApi(id)
  ElMessage.success('删除成功')
  getUsers(
    tableState.users.length === 1 ? paramsState.page - 1 : paramsState.page
  )
}

/* 
  获取分页列表
  */
const getUsers = async (page = paramsState.page, limit = paramsState.limit) => {
  paramsState.page = page
  paramsState.limit = limit
  listLoading.value = true
  const result = await getUserListApi(page, limit, {
    username: paramsState.searchUsername
  })
  listLoading.value = false
  const { items, total } = result
  tableState.users = items
  tableState.total = total
  tableState.selectedIds = []
}

/* 
  取消用户的保存或更新
  */
const cancel = () => {
  userState.dialogUserVisible = false
  userState.user = {
    username: '',
    nickName: '',
    password: ''
  }
}

/* 
  保存或者更新用户
  */
const addOrUpdate = async () => {
  // 进行表单校验
  await userFormRef.value?.validate()

  const { user } = userState
  if (user.username === 'admin') {
    alert('admin账号不能添加或更新')
    return
  }
  userState.userLoading = true
  try {
    await saveOrUpdateUserApi(user)
    userState.userLoading = false
    ElMessage.success('保存成功!')
    getUsers(user.id ? paramsState.page : 1)
    userState.user = {
      username: '',
      nickName: '',
      password: ''
    }
    userState.dialogUserVisible = false
  } catch (error) {
    userState.userLoading = false
  }
}
</script>
